Clinical case

From: Newsom, Brian S. (BSNEWSOM@txccc.org)
Date: Fri Jan 07 2000 - 12:56:34 EST


We have a pediatric male patient that presented in July of 1999 with
neutropenia and a flow phenotype of 12% small (by FSC) cells positive for
CD10,CD19,CD22, HLA-DRand 50% CD20, K and L negative. He is back in the
clinic now with the exact same clonal population, still 12% and still the
same phenotype. I have two questions about this?

1. Everyone says that hematagones are CD22 negative. Is it possible that
these are hematagones even though they are strongly CD22 positive?

2. Are there any additional flow markers that we could use to help define
these cells and diagnose the patient?

Any help very much appreciated.

Thanks,
Brian Newsom
Director, Flow Cytometry
Center for Cell and Gene Therapy
Baylor College of Medicine




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